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Grade 9 Photosynthesis & Respiration Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Science

Unit 6: Going FurtherAdvanced: Biology II PreviewNGSS HS-LS1-5Advanced

Photosynthesis and cellular respiration: their inputs, outputs and where each takes place in the cell. This free high school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Photosynthesis & Respiration

Grade 9 · Science

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Name

Class

Date

Learning goal: Advanced: Biology II Preview · NGSS HS-LS1-5

Directions: This worksheet has 3 parts. Read the instructions at the start of each part.

Example

What gas do plants release as a byproduct of photosynthesis?

Answer: oxygen

Part A

Label the diagram. Use the words in the box.

Word bank

sunlightwatercarbon dioxideoxygen
glucose1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Match each clue to the right word. Write the letter in the box.

  1. 5What pigment captures light energy for photosynthesis?
  2. 6What gas do plants take in for photosynthesis?
  3. 7What is produced by anaerobic respiration in human muscles?
  4. 8Which organelle is the site of cellular respiration in a cell?
  5. 9What sugar is made during photosynthesis?
  6. 10What energy-carrying molecule does cellular respiration produce?
  • AMitochondria
  • BATP
  • CLactic acid
  • DCarbon dioxide
  • EGlucose
  • FChlorophyll
Part C

Answer each question. Use full sentences where you can.

  1. 11

    In what way are photosynthesis and cellular respiration opposites?

  2. 12

    Write the general word equation for photosynthesis.

  3. 13

    Do plants carry out cellular respiration as well as photosynthesis?

  4. 14

    What do yeast produce during anaerobic respiration (fermentation)?

  5. 15

    Write the general word equation for aerobic respiration.

  6. 16

    Write the balanced chemical equation for aerobic respiration.

★ Challenge corner for fast finishers

You are in a closed room with a candle, a match and a lamp. What do you light first?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/9/bio_photosynthesis_respiration

Answer key (click to show)
  1. 1.sunlight
  2. 2.carbon dioxide
  3. 3.oxygen
  4. 4.water
  5. 5.F — chlorophyll
  6. 6.D — carbon dioxide
  7. 7.C — lactic acid (and a little ATP)
  8. 8.A — the mitochondria
  9. 9.E — glucose
  10. 10.B — ATP
  11. 11.photosynthesis stores energy from sunlight in glucose; respiration releases that stored energy
  12. 12.carbon dioxide + water (+ light) → glucose + oxygen
  13. 13.yes, all living cells respire
  14. 14.ethanol and carbon dioxide
  15. 15.glucose + oxygen → carbon dioxide + water (+ energy)
  16. 16.C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O (+ ATP)
  17. ★the match (challenge corner)

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